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Educational app on the microeconomic foundations of macroeconomic stabilization
MicroFoundations of Stabilization — Android (Java) Educational app on the microeconomic foundations of macroeconomic stabilization. IIG Technology · package `com.iigtechnology.micro_ndations` ## Screens 1. **Theory** — 7 topics: Lucas critique; household Euler equation; labour supply and the output gap; monopolistic competition and Calvo pricing; the three-equation NK model; Taylor principle, divine coincidence and optimal discretion; fiscal stabilization (Ricardian equivalence, HANK, ZLB multipliers). 2. **NK simulator** — analytical impulse responses (20 quarters) of output gap, inflation, nominal and real rate to demand, cost-push and monetary shocks; determinacy check (Bullard–Mitra); welfare loss Σβᵗ(π² + λx²) under the Taylor rule vs. optimal discretion (dashed lines). 3. **Consumption & interest rate** — 40-year CRRA consumer, Euler equation, effect of r + 1 pp. 4. **Price stickiness (Calvo)** — share of prices not yet reset, average duration, Phillips-curve slope κ. ## Languages English (default), Bulgarian, German, French, Spanish — in-app switcher, independent of device locale. Language splits are disabled in the App Bundle so the switcher works after Google Play delivery. ## Model IS: x = E[x'] − (1/σ)(i − E[π'] − rⁿ) NKPC: π = βE[π'] + κx + u, κ = (1−θ)(1−βθ)(σ+φ)/θ Rule: i = φπ·π + φx·x + v Solved by undetermined coefficients for AR(1) shocks; β = 0.99, ε = 6, λ = κ/ε.